I grew up in a socially conservative Republican family, and became liberal in my late teens. And that's exactly why I am against ostracizing people who hold conservative Republican views.

I became a liberal today because liberals took the time to have civil conversations me about my intolerance, and I realized that liberals were right. I am grateful to the people who did that for me, and I want to extend the same courtesy to others.

Pragmatically, if liberals had ostracized me or "canceled" me, it's quite likely that I would still hold those intolerant views today. By taking the stance that "we don't talk to Republicans", liberals are cutting off the only mechanism by which Republicans become liberals. And those people who you alienate instead of converting become angry, and that anger motivates them to go to the polls. Do you want Trump to get re-elected? Because what you're doing is contributing to Trump getting re-elected.